Sash-balance



(No Model.)

' J. H. JENKINS.

SASH BALANCE.

No. 394,698. Patented Dec. 18,

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IIVVE/VZ'OH ATTORNEY d WIT/ll 858:

UNITED STATES PATENT OFFICE.

JAMES HARVY JENKINS, OF TIIoMAsvILLE, GEORGIA.

SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 394,698, dated December 18, 1888.

Application filed May 18, 1888. Serial No. 274,336. (No model.)

To all whmn it may concern:

Be it known that I, JAMES HARVY JENKINS, of 'lhomasville, inthe countv of Thomas and State of Georgia, have invented a new and useful Improvement in Sash- Balances, of which the following is a specification.

The object of my invention is to furnish means whereby windows in dwelling-apartments and other buildings may be operated with ease and safety for the purpose of procuring proper ventilation.

To this end it consists in the peculiar construction and arrangement of devices, which I will now proceed to fully describe.

Figure l is a front elevation of a window provided with my invention. Fig. 2 is a vertical section through line a; 00 of Fig. 1, and Fig. 3 is a detail of the cramping pulley and spring.

A is the upper and B the lower sash of a window. To the top of the window-frame is secured a pulley-plate, 0, between lugs on which plate is journaled a pulley, D, having three oblique grooves in the same. On one side of the pulley-plate the metal is recessed to give a large space between the edge of the pulley and the plate, and on the other side the pulley-plate approaches the edge of the pulley quite closely, so as to catch and pinch the cord E that passes over it. This cord attached at one end to the top of the upper sash, and after passing over the pulley descends to and is clamped in the tubular section a of a hand-hold composed of two rings, 1) b, and a lower central loop, 0. This handhold is intended for raising and lowering the upper sash either singly or in connection with the lower sash.

For operating the upper sash alone the cord is pulled down by means of the handhold, and for raising or lowering the sash the cord is kept in the open space 0 on the left of the pulley-frame, in which position the cord runs freely and the sash moves up or down. then it is desired to stop the sash at any definite point, the cord is swung to the right by means of the hand-hold, and the cord, then riding upon the inclined grooves of the pulley, is jammed between it and the frame, thus holding the sash to its position.

In order to render the deflection of the cord and the engagement of the pulley thereagainst automatic, so that the top sash cannot accidentally fall, a spring-wire cord-guide, F, is fastened to the top of the frame, being clamped between the wood and the pulleyplate, and its lower end is formed into a loop through which the cord passes. This cordguide has a set-off to the right, as in Fig. 3, so that the natural tension of the same tends to throw the cord into its cramping position in the pulley. \Vhen the hand-hold pulls down the cord, this cord-guide yields to the direction of the pull and allows the cord to move freely.

For working the upper and lower sash simultaneously the top or meeting rail of the lower sash is provided with a hook-shaped catch, G, and over this catch is hooked the loop 0 of the hand-hold. \Vhen so connected, the two sashes balance each other and remain in the position to which they are adjusted. This hook-shaped catch is so fashioned that the hand-hold may be easily slipped off of the same.

Among other advantages possessed by my invention may be mentioned the fact that it dispenses with the cost of box-frames, cords, weights, and pulleys, and may be easily ap plied to windows that have already been put in houses without balance-weights.

I am aware that it is not broadly new to balance one sash by the other through the instrumentality of a cord passing over a pulley above and having its ends attached to the two sashes. I am also aware that a pulley having a periphery of irregular radius for cramping the cord is not broadly new; but when such pulley is combined with a cord passing over it and attached to the upper sash, and having a detachable connection for the lower sash, it will be seen that the cord maybe entirely disconnected from the lower sash and the upper sash held at various points of suspension by the cramping eliiect of the pulley on the cord, thus securing a double function for the pulley by using it both as a cramping-pulley for holding the upper sash and also as a supporting-pulley for the cord when the sashes are in balance.

Having thus described my invention, what I claim as new is 1. The combination, with the two sashes of a window, of. a cramping-pulley, D, having a frame approaching the periphery of the pulley closer on one side than it does upon the other, a cord passing over the same and having its ends connected to the two sashes, and

a spring-wire guide, F, clamped between the pulley-frame and the Window-easing and having a loop extending below the pulley to receive the cord, and for the purpose described. r

2. The combination of the upper sash, a supporting-pulley fixed to the window-easing at the top, a cord attached to the upper sash and passing over the pulley, a hand-hold composed of tube a for the cord, rings 17 b, and loop a, and the hook-shaped catch G, fixed to 15 the lower sash and adapted to engage the loop 0 of the hand-hold, as described.

JAMES HARVY JENKINS.

\Vitnesses:

JNo. N. TODD, GEORGE W. HERRING. 

